/*
 * Copyright 2022 Deep Learning on Flink Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.flinkextended.flink.ml.data;

import java.io.Closeable;
import java.io.IOException;

/** date exchange read record interface. */
public interface RecordReader extends Closeable {
    /**
     * no blocking read function.
     *
     * @return
     * @throws IOException
     */
    byte[] tryRead() throws IOException;

    /** @return true: read reach end; false: read not reach end. */
    boolean isReachEOF();

    /**
     * blocking read function.
     *
     * @return read byte[].
     * @throws IOException
     */
    byte[] read() throws IOException;
}
